wait a sec !!!! you say AMD XP 2200 ? is it the 0.18 micron ????
no way , i tryed to turn my Ati 9700 pro with xp 2100 with quality poversuply but no way, imagine even when upgradet to Antec 550 W true power , no way to turn it corectly ,
well then i instaled a xp 2400 multiplied to turn 2600 at 13 micron and everithing FINE
so , at first try change if you can the CPU !!!! 18 micron suxx
about your extreme low frame rate , seems your AGP bus have some problems ! check Twice your damn seting in Bios !!!!!!!